Know Your Environment. Protect Your Health.

Diquat

Vixen Water System

Diquat is a herbicide used on potato crops and aquatic weeds.

 

10

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018N/A00N/A
2019ND40ND
2020N/A00N/A
2021ND10ND
2022ND50ND
2023N/A00N/A

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 6 ppb

The EWG Health Guideline of 6 ppb for diquat was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cataracts.

EPA Maximum Contaminant
Level (MCL): 20 ppb

The legal limit for diquat, established in 1992, was based on a toxicity study in laboratory animals conducted in the 1980s.

ppb = parts per billion

All test results

Date Lab ID Result
2019-03-2635457369001ND
2019-03-2635457369002ND
2019-03-2635457369001ND
2019-03-2635457369002ND
2021-06-0935640031001ND
2022-02-2135698852001EFND
2022-02-2135698852002EFND
2022-02-2135698852003EFND
2022-05-0335714819003ND
2022-09-1335747178001ND